Articles with "phase encoding" as a keyword



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Assessing methods for geometric distortion compensation in 7 T gradient echo functional MRI data

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Published in 2021 at "Human Brain Mapping"

DOI: 10.1002/hbm.25540

Abstract: Echo planar imaging (EPI) is widely used in functional and diffusion‐weighted MRI, but suffers from significant geometric distortions in the phase encoding direction caused by inhomogeneities in the static magnetic field (B0). This is a… read more here.

Keywords: distortion compensation; field; distortion; phase encoding ... See more keywords
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Regularly incremented phase encoding – MR fingerprinting (RIPE‐MRF) for enhanced motion artifact suppression in preclinical cartesian MR fingerprinting

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Published in 2018 at "Magnetic Resonance in Medicine"

DOI: 10.1002/mrm.26865

Abstract: The regularly incremented phase encoding–magnetic resonance fingerprinting (RIPE‐MRF) method is introduced to limit the sensitivity of preclinical MRF assessments to pulsatile and respiratory motion artifacts. read more here.

Keywords: incremented phase; phase encoding; regularly incremented; mrf ... See more keywords
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A new ultrafast 3D gradient echo‐based imaging method using quadratic‐phase encoding

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Published in 2019 at "Magnetic Resonance in Medicine"

DOI: 10.1002/mrm.27711

Abstract: To propose a novel 3D ultrafast gradient echo‐based MRI method, dubbed RASE, using quadratic‐phase encoding. read more here.

Keywords: echo based; using quadratic; gradient echo; phase encoding ... See more keywords
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239. A protocol for advanced QA in DW

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Published in 2018 at "Physica Medica"

DOI: 10.1016/j.ejmp.2018.04.250

Abstract: Purpose The aim of this study is to propose a protocol for DWI QA being easy to implement while still providing quantitative information on relevant parameters for the scanner QC as well as for clinical… read more here.

Keywords: direction; gdd; adc; phase encoding ... See more keywords
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Multiple-image encryption scheme via compressive sensing and orthogonal encoding based on double random phase encoding

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Published in 2018 at "Journal of Modern Optics"

DOI: 10.1080/09500340.2018.1498547

Abstract: ABSTRACT We propose an optical multiple-image encryption scheme based on compressive sensing and double random phase encoding. The orthogonal encoding method is used for integrating and extracting multiple-image compressed sampling data. In the encryption process,… read more here.

Keywords: image; phase encoding; multiple image; random phase ... See more keywords
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On the Security of Optical Ciphers Under the Architecture of Compressed Sensing Combining With Double Random Phase Encoding

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Published in 2017 at "IEEE Photonics Journal"

DOI: 10.1109/jphot.2017.2716961

Abstract: This work investigates the security of optical ciphers integrating compressed sensing (CS) with double random phase encoding. Theoretical analysis demonstrates that the combined system, regardless of the implementation order of the two procedures, can be… read more here.

Keywords: compressed sensing; phase encoding; security optical; optical ciphers ... See more keywords
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Image Encryption Technique Combining Compressive Sensing with Double Random-Phase Encoding

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Published in 2018 at "Mathematical Problems in Engineering"

DOI: 10.1155/2018/6764052

Abstract: A new image compression-encryption method based on compressive sensing and double random-phase encoding is proposed, which can complete image compression and encryption simultaneously. We utilize the hyperchaotic system to generate a measurement matrix and two… read more here.

Keywords: image; phase encoding; encryption; random phase ... See more keywords
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Optical encryption based on double random-phase encoding: secure versus unsecure variants.

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Published in 2020 at "Applied optics"

DOI: 10.1364/ao.383506

Abstract: A smart brute-force double random-phase encoding attack is presented that takes advantage of an unreported vulnerability: the smoothness of mean squared error (MSE) and correlation coefficient (CC) curves in a key-sensitivity analysis. The vulnerability reported… read more here.

Keywords: encryption based; phase encoding; optical encryption; random phase ... See more keywords
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Cryptanalysis of random-phase-encoding-based optical cryptosystem via deep learning.

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Published in 2019 at "Optics express"

DOI: 10.1364/oe.27.021204

Abstract: Random Phase Encoding (RPE) techniques for image encryption have drawn increasing attention during the past decades. We demonstrate in this contribution that the RPE-based optical cryptosystems are vulnerable to the chosen-plaintext attack (CPA) with deep… read more here.

Keywords: random phase; deep learning; rpe; phase encoding ... See more keywords
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Multidimension-multiplexed full-phase-encoding holography.

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Published in 2022 at "Optics express"

DOI: 10.1364/oe.456229

Abstract: I propose a multidimension-multiplexed imaging method with which multiple physical quantities of light are simultaneously obtained as interference fringe images. The varieties of light are distinguished by exploiting the proposed phase-encoding technique. Neither measurements of… read more here.

Keywords: multiplexed full; holography; phase encoding; multidimension multiplexed ... See more keywords
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Cancelable biometric system for IoT applications based on optical double random phase encoding.

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Published in 2022 at "Optics express"

DOI: 10.1364/oe.466101

Abstract: The security issue is essential in the Internet-of-Things (IoT) environment. Biometrics play an important role in securing the emerging IoT devices, especially IoT robots. Biometric identification is an interesting candidate to improve IoT usability and… read more here.

Keywords: double random; system; phase encoding; iot ... See more keywords